public class StartCustomTextView extends TextView {
public static int m_iTextHeight;
//文本的高度
public static int m_iTextWidth;
//文本的宽度
private Paint mPaint =
null
;
private String string=
""
;
private float LineSpace = 0;
//行间距
private int left_Margin;
private int right_Margin;
private int bottom_Margin;
public StartCustomTextView(Context context, AttributeSet set)
{
super
(context,set);
DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
TypedArray typedArray = context.obtainStyledAttributes(set, R.styleable.CYTextView);
int width = displayMetrics.widthPixels;
left_Margin = 29;
right_Margin = 29;
bottom_Margin = 29;
width = width - left_Margin -right_Margin;
float textsize = typedArray.getDimension(R.styleable.CYTextView_textSize, 34);
int textcolor = typedArray.getColor(R.styleable.CYTextView_textColor, getResources().getColor(R.color.white));
float linespace = typedArray.getDimension(R.styleable.CYTextView_lineSpacingExtra, 15);
int typeface = typedArray.getColor(R.styleable.CYTextView_typeface, 0);
typedArray.recycle();
//设置 CY TextView的宽度和行间距www.jcodecraeer.com
m_iTextWidth=width;
LineSpace=linespace;
// 构建paint对象
mPaint =
new
Paint();
mPaint.setAntiAlias(
true
);
mPaint.setColor(textcolor);
mPaint.setTextSize(textsize);
switch
(typeface){
case
0:
mPaint.setTypeface(Typeface.DEFAULT);
break
;
case
1:
mPaint.setTypeface(Typeface.SANS_SERIF);
break
;
case
2:
mPaint.setTypeface(Typeface.SERIF);
break
;
case
3:
mPaint.setTypeface(Typeface.MONOSPACE);
break
;
default
:
mPaint.setTypeface(Typeface.DEFAULT);
break
;
}
}
@Override
protected void onDraw(Canvas canvas)
{
super
.onDraw(canvas);
char ch;
int w = 0;
int istart = 0;
int m_iFontHeight;
int m_iRealLine=0;
int x=2;
int y=30;
Vector m_String=
new
Vector();
FontMetrics fm = mPaint.getFontMetrics();
m_iFontHeight = (int) Math.ceil(fm.descent - fm.top) + (int)LineSpace;
//计算字体高度(字体高度+行间距)
for
(int i = 0; i < string.length(); i++)
{
ch = string.charAt(i);
float[] widths =
new
float[1];
String srt = String.valueOf(ch);
mPaint.getTextWidths(srt, widths);
if
(ch ==
'\n'
){
m_iRealLine++;
m_String.addElement(string.substring(istart, i));
istart = i + 1;
w = 0;
}
else
{
w += (int) (Math.ceil(widths[0]));
if
(w > m_iTextWidth){
m_iRealLine++;
m_String.addElement(string.substring(istart, i));
istart = i;
i--;
w = 0;
}
else
{
if
(i == (string.length() - 1)){
m_iRealLine++;
m_String.addElement(string.substring(istart, string.length()));
}
}
}
}
m_iTextHeight=m_iRealLine*m_iFontHeight+2;
canvas.setViewport(m_iTextWidth, m_iTextWidth);
for
(int i = 0, j = 0; i < m_iRealLine; i++, j++)
{
canvas.drawText((String)(m_String.elementAt(i)), x, y+m_iFontHeight * j, mPaint);
}
}
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int measuredHeight = measureHeight(heightMeasureSpec);
int measuredWidth = measureWidth(widthMeasureSpec);
this
.setMeasuredDimension(measuredWidth, measuredHeight);
LayoutParams layout =
new
LinearLayout.LayoutParams(measuredWidth,measuredHeight);
layout.leftMargin= left_Margin;
layout.rightMargin= right_Margin;
layout.bottomMargin= bottom_Margin;
this
.setLayoutParams(layout);
super
.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private int measureHeight(int measureSpec)
{
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
// Default size if no limits are specified.
initHeight();
int result = m_iTextHeight;
if
(specMode == MeasureSpec.AT_MOST){
// Calculate the ideal size of your
// control within this maximum size.
// If your control fills the available
// space return the outer bound.
result = specSize;
}
else
if
(specMode == MeasureSpec.EXACTLY){
// If your control can fit within these bounds return that value.
// result = specSize;
}
return
result;
}
private void initHeight()
{
//设置 CY TextView的初始高度为0
m_iTextHeight=0;
//大概计算 CY TextView所需高度
FontMetrics fm = mPaint.getFontMetrics();
int m_iFontHeight = (int) Math.ceil(fm.descent - fm.top) + (int)LineSpace;
int line=0;
int istart=0;
int w=0;
for
(int i = 0; i < string.length(); i++)
{
char ch = string.charAt(i);
float[] widths =
new
float[1];
String srt = String.valueOf(ch);
mPaint.getTextWidths(srt, widths);
if
(ch ==
'\n'
){
line++;
istart = i + 1;
w = 0;
}
else
{
w += (int) (Math.ceil(widths[0]));
if
(w > m_iTextWidth){
line++;
istart = i;
i--;
w = 0;
}
else
{
if
(i == (string.length() - 1)){
line++;
}
}
}
}
m_iTextHeight=(line)*m_iFontHeight+2;
}
private int measureWidth(int measureSpec)
{
int specMode = MeasureSpec.getMode(measureSpec);
int specSize = MeasureSpec.getSize(measureSpec);
// Default size if no limits are specified.
int result = 500;
if
(specMode == MeasureSpec.AT_MOST){
// Calculate the ideal size of your control
// within this maximum size.
// If your control fills the available space
// return the outer bound.
result = specSize;
}
else
if
(specMode == MeasureSpec.EXACTLY){
// If your control can fit within these bounds return that value.
result = specSize;
}
return
result;
}
public void SetText(String text)
{
string = text;
// requestLayout();
// invalidate();
}
}